From 32eb9e3bcbbe4c92e7d890e591a3e5bc639bff34 Mon Sep 17 00:00:00 2001
From: Kelsi <kelsihates2fa@gmail.com>
Date: Mon, 9 Mar 2026 01:12:44 -0700
Subject: [PATCH] Default wrapper backend to Vulkan runtime across platforms

---
 README.md                               | 4 ++--
 docs/AMD_FSR2_INTEGRATION.md            | 1 +
 src/rendering/amd_fsr3_wrapper_impl.cpp | 4 ----
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index d5b73648..d0fffdeb 100644
--- a/README.md
+++ b/README.md
@@ -209,8 +209,8 @@ make -j$(nproc)
     - `wowee_fsr3_vk_wrapper` now builds automatically when FSR3 SDK headers are present and outputs to `build/bin/libffx_fsr3_vk_wrapper.*`.
     - Wrapper backend override (what the wrapper loads underneath): `WOWEE_FSR3_WRAPPER_BACKEND_LIB=/absolute/path/to/libffx_fsr3_vk.so`.
     - Wrapper backend mode:
-      - `WOWEE_FSR3_WRAPPER_BACKEND=vulkan_runtime` (default on non-Windows)
-      - `WOWEE_FSR3_WRAPPER_BACKEND=dx12_bridge` (default on Windows; bridge dispatch wiring still in progress)
+      - `WOWEE_FSR3_WRAPPER_BACKEND=vulkan_runtime` (default on all platforms)
+      - `WOWEE_FSR3_WRAPPER_BACKEND=dx12_bridge` (opt-in; bridge dispatch wiring still in progress)
     - DX12 runtime override (for `dx12_bridge`):
       - `WOWEE_FSR3_DX12_RUNTIME_LIB=C:\\path\\to\\amd_fidelityfx_framegeneration_dx12.dll`
     - DX12 device validation probe (default on):
diff --git a/docs/AMD_FSR2_INTEGRATION.md b/docs/AMD_FSR2_INTEGRATION.md
index b1bcd29a..eef256cb 100644
--- a/docs/AMD_FSR2_INTEGRATION.md
+++ b/docs/AMD_FSR2_INTEGRATION.md
@@ -55,6 +55,7 @@ Runtime note:
 - Wrapper backend mode selection:
   - `WOWEE_FSR3_WRAPPER_BACKEND=vulkan_runtime`
   - `WOWEE_FSR3_WRAPPER_BACKEND=dx12_bridge`
+- Default is `vulkan_runtime` on all platforms. `dx12_bridge` is opt-in while Vulkan<->DX12 interop dispatch is still in progress.
 - DX12 bridge runtime override:
   - `WOWEE_FSR3_DX12_RUNTIME_LIB=<path-to-amd_fidelityfx_framegeneration_dx12.dll>`
 - DX12 bridge device preflight toggle:
diff --git a/src/rendering/amd_fsr3_wrapper_impl.cpp b/src/rendering/amd_fsr3_wrapper_impl.cpp
index 5b045e5d..f3498894 100644
--- a/src/rendering/amd_fsr3_wrapper_impl.cpp
+++ b/src/rendering/amd_fsr3_wrapper_impl.cpp
@@ -110,11 +110,7 @@ WrapperBackend selectBackend() {
             }
         }
     }
-#if defined(_WIN32)
-    return WrapperBackend::Dx12Bridge;
-#else
     return WrapperBackend::VulkanRuntime;
-#endif
 }
 
 FfxErrorCode vkSwapchainConfigureNoop(const FfxFrameGenerationConfig*) {